It isn't even the teachers that make you get up, it's simply the law to do so. It's mandatory above the age of 6 and your parents would get in a lot of trouble if they didn't. You shouldn't disrespect teachers, they took a bad job that is necessary for students and they hate the teachers for it. Teachers get paid so much less than any other job and it's honestly surprised with how much bullshit they have to put up with. The only reason teachers bother taking your phones when you use them in class is that they are angry that you're getting free education and you not even bothering, in college, they don't care because you or your parents are paying for it and you're just wasting your money if you use it in college.